Completion Strategy:

When this level comes to mind, you think to yourself, 'One bot, pffft... this shouldn't be too hard'. Well....... you're right.
It isn't hard. Only if you're in the right place at the right time.
The bot has a higher stamina then you, meaning it only takes 3-4 shots from the Garret to take him down.
What I recommend you do is spawn outside near the courtyard, grab a Lugar, and watch both of the entrances for him.
As soon as you see him, gun him down quickly.

- Lenny

Platinum/Fast Time Strategy:

Platinum couldn't be any easier this level.
If you're going for a fast time, then forget about spawning outside in the courtyard this time.
Instead, spawn until you're near the Double Garrets.
Get them, and then go up the stairs.
The bot will immediately be coming down them. Kill him.
For the second kill, he'll spawn in either places.
He'll spawn either near the pots, near the courtyard fountain, near the house with the ladder, or underground near the other set of stairs.
What I usually do is listen to how high or low the pitch is of the spawn sound.
If it's low, or you hear nothing, I guarantee you he'll be outside near the courtyard.
If it's high, just make your way outside in courtyard, and use the same strategy as I explained above.

Believe me, you'll earn platinum very quickly.

- Lenny